condition mean min max 4 h after light 5.948263333333333 5.9391 5.95606 8 h after light 7.487216666666667 7.35783 7.62972 12 h after light 7.71677 7.69954 7.74507 4 h after dark 7.4451 7.40353 7.47155 8 h after dark 7.452016666666667 7.23285 7.61035 12 h after dark 6.6278 6.3083800000000005 6.822139999999999